Provided in embodiments of the present invention are a method and device for transmitting a high-definition video signal, comprising: isolating from the high-definition video signal a brightness signal and a chrominance signal, and, by using an analog signal transmission mode, using non-overlapping frequency hands to transmit respectively the brightness signal and the chrominance signal. The solution of the present invention employs the analog signal transmission method, utilizes independent frequency bands to transmit respectively the brightness signal and the chrominance signal, and ensures that the brightness signal and the chrominance signal do not affect each other, thus ensuring video quality and timeliness of the high-definition video signal when transmitted over a long distance.
Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A method of transmitting a video signal, the method comprising: separating a first signal and a second signal from the video signal; selecting a first band for transmitting the first signal; selecting, based on the first band, a second band for transmitting the second signal; transmitting the first signal in the first band; and transmitting the second signal in the second band, wherein: the first band and the second band are separate bands, the transmitting the first signal in the first band or transmitting the second signal in the second band comprises using a transmission mode of an analog signal, and the using a transmission mode of the analog signal comprises: converting the first signal into a first quantized value, modulating and then loading the second signal onto an intermediate-frequency carrier to generate a second quantized value, superimposing the first quantized value the second quantized value to generate a superimposed signal, and converting the superimposed signal into the analog signal for transmission.
A method for transmitting video signals involves separating the video signal into a first signal (like brightness) and a second signal (like color). The method selects a specific frequency band for each signal, ensuring these bands are separate. The first and second signals are transmitted using analog signal transmission. Specifically, the first signal is converted into a quantized value. The second signal is modulated and loaded onto an intermediate-frequency carrier to create another quantized value. These quantized values are combined into a superimposed signal, which is then converted into an analog signal for transmission.
2. The method of claim 1 , wherein a clock synchronization signal is coupled at a blanking location of the video signal as a clock source of the second signal for recovering sample.
The video signal transmission method, as described in claim 1, includes coupling a clock synchronization signal at a blanking location of the video signal to be used as a clock source for recovering samples of the second signal (like color). That is, a clock signal is inserted during the blanking interval (the time when the screen isn't actively displaying information) and utilized to ensure accurate timing when reconstructing the second signal at the receiving end.
3. The method of claim 1 , the selecting the first band comprising determining the bandwidth of the first band based on a horizontal resolution of the video signal or a frame rate.
In the video signal transmission method of claim 1, the process of selecting the frequency band for the first signal (like brightness) involves determining the bandwidth based on either the horizontal resolution of the video signal or its frame rate. For example, higher horizontal resolution video or higher frame rates require wider bandwidth to transmit the details of the brightness signal.
4. The method of claim 1 , the selecting the second band comprising determining the bandwidth of the second band based on a color resolution of the video signal.
In the video signal transmission method of claim 1, the selection of the frequency band for transmitting the second signal (like color) includes determining the necessary bandwidth based on the color resolution of the video signal. For instance, higher color resolution necessitates a wider bandwidth to transmit the detailed color information.
5. The method of claim 1 , wherein the video signal is in at least one format of the format 720P, the format 1080P, the format 1280H, or the format 1920H.
The video signal transmission method of claim 1 applies to video signals in at least one of these formats: 720P, 1080P, 1280H, or 1920H. These are common high-definition video formats with varying resolutions.
6. The method of claim 1 , wherein the transmitting the first signal in the first band or transmitting the second signal in the second band comprises: using a transmission mode of an analog signal.
The video signal transmission method, as described in claim 1, transmits the first signal (like brightness) in its allocated band or the second signal (like color) in its allocated band, by using analog signal transmission.
7. The method of claim 1 , wherein the first signal comprises a luminance signal, and the second signal comprises a chrominance signal.
In the video signal transmission method of claim 1, the first signal represents the luminance signal (brightness information), and the second signal represents the chrominance signal (color information).
8. The method of claim 1 , wherein the first band and the second band are no more than a preset threshold, and the preset threshold is no less than 20 MHz.
In the video signal transmission method of claim 1, the frequency separation between the first band and the second band is no more than a preset threshold, and that threshold is set to no less than 20 MHz. This limits how far apart the frequencies can be, possibly for signal integrity purposes.
9. The method of claim 1 , wherein the first band and the second band are non-overlapping.
In the video signal transmission method of claim 1, the first frequency band and the second frequency band are non-overlapping. This prevents interference between the first signal (like brightness) and the second signal (like color).
10. The method of claim 1 , wherein the selecting the second band for transmitting the second signal comprises: determining the frequency of the second band based on a preset frequency gap between the first band and the second band.
In the video signal transmission method of claim 1, the selection of the frequency band for the second signal (like color) includes determining the specific frequency based on a preset frequency gap maintained between the first band and the second band. This ensures a consistent separation between the bands to reduce interference.
11. A device for transmitting a video signal, the device including a processor and being configured to: separate a first signal and a second signal from the video signal; transmit the first signal in a first band; transmit the second signal in a second band; convert the first signal into a first quantized value.
A device for transmitting a video signal includes a processor that separates the video signal into a first signal (like brightness) and a second signal (like color). The processor transmits the first signal in a first frequency band and the second signal in a second frequency band. It converts the first signal into a quantized value.
12. The device of claim 11 , wherein the device is further configured to: couple a clock synchronization signal at a blanking location of the video signal as a clock source of the second signal for recovering sample.
The video signal transmission device from claim 11 also couples a clock synchronization signal at a blanking location of the video signal. This clock signal acts as a clock source when recovering samples of the second signal (like color) at the receiving end, improving timing accuracy.
13. The device of claim 11 , wherein the device is further configured to output the analog signal obtained by conversion onto a coaxial cable for transmission, wherein both the first band and the second band are no more than a preset threshold.
The video signal transmission device of claim 11 is also configured to output the analog signal produced by conversion onto a coaxial cable for transmission. Both the first frequency band and the second frequency band have a frequency that is no more than a preset threshold.
14. The device of claim 11 , wherein the device is further configured to determine the bandwidth of the first band based on a horizontal resolution of the video signal or a frame rate.
The video signal transmission device of claim 11 determines the bandwidth of the first frequency band based on the horizontal resolution of the video signal or its frame rate.
15. The device of claim 11 , wherein the device is further configured to determine the bandwidth of the second band based on a color resolution of the video signal.
The video signal transmission device of claim 11 determines the bandwidth of the second frequency band based on the color resolution of the video signal.
16. The device of claim 11 , wherein the device is further configured to determine the frequency of the second band based on a preset frequency gap between the first band and the second band.
The video signal transmission device of claim 11 determines the frequency of the second band based on a preset frequency gap between the first and second bands.
17. The device of claim 11 , wherein the first band and the second band are non-overlapping.
The video signal transmission device of claim 11 uses a first frequency band and a second frequency band that are non-overlapping.
18. The device of claim 11 , wherein the video signal is in at least one format of the format 720P, the format 1080P, the format 1280H, or the format 1920H.
The video signal transmission device of claim 11 supports video signals in at least one of these formats: 720P, 1080P, 1280H, or 1920H.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
December 30, 2015
November 28, 2017
Browse 5M+ US patents with plain-English claim translations and AI-generated analysis.